Sage Derby /ˈdɑːrbi/ is a variety of Derby cheese that is mild, mottled green and semi-hard, and has a sage flavour.

[4] The colour is formed either by mixing sage leaves into the curd before it is pressed or by the addition of "green curd" from green corn or spinach juice.

In the latter case, the flavour has to be created with colourless sage extract.

[4] The first production began in the seventeenth century in England.

[citation needed] Sage Derby was initially only made for festive occasions such as harvest time and Christmas, but it is now available all year.